Quote: "Zero is the result of a number subtracting from its self"
Question: I wonder how someone who never saw the number will know that? I also wonder about how they would know that a number equal "0" with the other signs like multipucation or division?
Comment: It's pretty interesting how someone can determine what numbers equal to what. But I still don't quite get why the number "0" would be invented. What purpose is it really especially in division when at times you can't divied "0"
